I have stayed in the Dawn Garden Villa. It was not two big for the two of us
The two other bedrooms are a small % of the overall private space you have access to. The GV really came to life when we invited 10 or 20 others to join us and enjoy the space.
The fact is on most cruises that space is boked by parties of more then 2. They only way the economics really work.
If you want the best of the best for 2 then the AA and A2 Owners Suites are your best options. All the perks of the GV and 1/3 the space and price.